Pathway: Engineering Graphics & Design

Course: Introduction to Engineering Drawing and Design

Unit 9: ENGR-IED-9 Creating 3D Parametric Modeling from Drawings

Creating 3D Parametric Modeling from DrawingsCreating 3D Parametric Modeling from DrawingsCreating 3D Parametric Modeling from Drawings

ENGR-IED-11 Students will use orthographic projection to create and dimension multiview drawings.

a) Explain and apply nominal size, basic size, tolerance, unilateral tolerances, bilateral tolerances, fit, actual fit, clearance fit, interference fit, transition fit, allowance, maximum material limit, minimum material limit, basic-hole system, and basic-shaft system

b) Draw an object that is desired with two views

c) Draw an object that is described with three views

d) Select proper drawing scale, views, and layout

e) Draw an object that has an inclined surface

f) Draw an object containing circles and arcs

g) Change view, view names and multiview names

h) Create orthographic projections utilizing the necessary views

Creating 3D Parametric Modeling from DrawingsCreating 3D Parametric Modeling from DrawingsCreating 3D Parametric Modeling from Drawings

Enduring Understandings:

Creating and Editing Geometry Knowledge and understanding of how to

create and edit 2D geometry, convert into 3D features, and use features with predefined shapes

Defining Intent Knowledge and understanding of how to

construct robust CAD models which enable and endure a variety of changes

Creating 3D Parametric Modeling from Drawings

Essential Questions:

Why is it necessary to create well defined 2D

geometry?

How are feature relationships defined to enable a

variety of changes to occur without creating errors?

What order is used to establish dependent references

in order to define flexible geometry?

Why is it essential to understand possible variations of

the model before creating the geometry?

Creating 3D Parametric Modeling from Drawings

Knowledge from this Unit

Students should be able to do the following:

Explain how to fully define 2D geometry using constraints and dimensions

Show how parts are defined using 3D parametric geometry which accurately represents real-life or potential objects

Describe how parts can be created so a variety of error free changes can occur

Creating 3D Parametric Modeling from Drawings

Skills from this Unit

Students will be able to perform the following:

Define 2D geometry using constraints and dimensions

Create 3D geometry using 2D sketches and predefined features

Make error-free changes to a 3D parametric model to represent realistic variations

Creating 3D Parametric Modeling from Drawings

Five Daily Lesson Plans Day 1

The 3D Parametric CAD Environment Workflow

2D Sketches Dimensioning

Constraints 3D Features

Using 2D sketches Predefined shapes

Creating 3D Parametric Modeling from Drawings

Five Daily Lesson Plans Day 2

2D sketches & symmetry Revolved features Radial patterns Removing material with sketched features

Creating 3D Parametric Modeling from Drawings

Five Daily Lesson Plans

Day 3 Draft features Mirroring features Rounds Creating work planes Shell feature

Creating 3D Parametric Modeling from Drawings

Five Daily Lesson Plans Day 4

Metric units Symmetrical sketch constraint Extrude Holes Linear patterns

One direction Two directions

Creating 3D Parametric Modeling from Drawings

Five Daily Lesson Plans Day 5: Culminating Performance Task

Skills assessment Creating sketches Extruded features

Adding material Removing material

Rounds Shell Radial patterns Holes

Creating 3D Parametric Modeling from Drawings

2D SketchingEnvironment

3D PartEnvironment

3D AssemblyEnvironment

2D DrawingEnvironment

Creating 3D Parametric Modeling from Drawings

Unit Vocabulary Sketch Related

Constraints Coincident, Concentric, Equal, Horizontal, Vertical,

Parallel, Perpendicular, Symmetrical, Colinear, Tangent

Dimensions Linear Aligned Angular Radial Diameter

Creating 3D Parametric Modeling from Drawings

Unit Vocabulary 3D Features

Extrude Revolve Hole Round & Chamfer Draft Patterns

Radial Linear